PostgresSQL Replicator
- An asynchronous replica engine that provides some data ownership models and many conflict resolution algorithms. [open source, GNU License]
- http://pgreplicator.sourceforge.net/
Slony-I Project - A master to multiple slaves replication system supporting cascading and failover [Berkely/BSD]. - http://gborg.postgresql.org/project/slony1/
Command Prompt - Provides a supported, production quality PostgreSQL Replication. Also offers custom programming services, consulting and managed database hosting. - http://www.commandprompt.com/
Rserv - Installation guide for triggers to provide Master/Slave replication. - http://techdocs.postgresql.org/installguides.php#rserv
DBBalancer - Load balancing multithreaded PostgreSQL connection pool that has a replication mode to keep load balanced backend servers in sync. Currently in Alpha. - http://sourceforge.net/projects/dbbalancer/
Usogres - Real time backup utility. - http://usogres.good-day.net/